Don't think about it too much.
Possibly they are not the best plates in the world, nor are they calibrated for competition use; it would be absurd to demand more from them given their competitive price. This is not a gummy, "soft" plate that bounces; it is encapsulated weight in firm plastic/rubber, ideal for personal use. Highly recommended 100%.
No lo pienses mucho.
Posiblemente no sean los mejores discos del mundo, ni estén calibrados con vista a usarse en competición, sería absurdo exigirles más de lo que ofrecen dado su competitivo precio. No es un disco gomoso, "blando" y rebotó, se trata de peso encapsulado en plástico/goma firme ideal para uso particular. Recomendables 100%.